For other uses, see Wheel (disambiguation) and Wheels (disambiguation).
An early wheel made of a solid piece of wood
A wheel is a rotating component (typically circular in shape) that is intended to turn on an axle bearing. The wheel is one of the key components of the wheel and axle which is one of the six simple machines. Wheels, in conjunction with axles, allow heavy objects to be moved easily facilitating movement or transportation while supporting a load, or performing labor in machines. Wheels are also used for other purposes, such as a ship's wheel, steering wheel, potter's wheel, and flywheel.
Common examples can be found in transport applications. A wheel reduces friction by facilitating motion by rolling together with the use of axles. In order for wheels to rotate, a moment needs to be applied to the wheel about its axis, either by way of gravity or by the application of another external force or torque. Using the wheel, Sumerians invented a device that spins clay as a potter shapes it into the desired object.
A Ferris wheel (also called a Giant Wheel or an observation wheel) is an amusement ride consisting of a rotating upright wheel with multiple passenger-carrying...
water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists...
A steering wheel (also called a driving wheel, a hand wheel, or simply wheel) is a type of steering control in vehicles. Steering wheels are used in most...
The wheel size for a motor vehicle or similar wheel has a number of parameters. The millimetre is most commonly used to specify dimensions in modern production...
A color wheel or color circle is an abstract illustrative organization of color hues around a circle, which shows the relationships between primary colors...
A spinning wheel is a device for spinning thread or yarn from fibres. It was fundamental to the cotton textile industry prior to the Industrial Revolution...
The Wheel of Time is a series of high fantasy novels by American author Robert Jordan, with Brandon Sanderson as a co-author for the final three installments...
Stealers Wheel were a Scottish folk rock/rock band formed in 1972 in Paisley, Scotland, by former school friends Joe Egan and Gerry Rafferty. Their best-known...
The breaking wheel, also known as the execution wheel, the Wheel of Catherine or the (Saint) Catherine('s) Wheel, was a torture method used for public...
The dharmachakra (Pali: dhammacakka, Devanagari: धर्मचक्र) or wheel of dharma is a widespread symbol used in Buddhism. The symbol also finds usage in...
A drive wheel is a wheel of a motor vehicle that transmits force, transforming torque into tractive force from the tires to the road, causing the vehicle...
The Falkirk Wheel (Scottish Gaelic: Cuibhle na h-Eaglaise Brice) is a rotating boat lift in Tamfourhill, Falkirk, in central Scotland, connecting the...
A tracing wheel, also known as a pattern wheel, pounce wheel, and dart wheel, is an instrument with multiple teeth on a wheel attached to a handle. The...
Look up catherine wheel in Wiktionary, the free dictionary. Catherine wheel may refer to: wheel or breaking wheel, an instrument of torturous execution...
A bicycle wheel is a wheel, most commonly a wire wheel, designed for a bicycle. A pair is often called a wheelset, especially in the context of ready built...
steel, the most common material used in wheel production, is an alloy of iron and carbon, the term "alloy wheel" is usually reserved for wheels made from...
Look up big wheel or big wheels in Wiktionary, the free dictionary. Big wheel may refer to: Big Wheel (tricycle), a low-riding tricycle, usually made...
to: The Wheel of Fortune (Burne-Jones), 1883 painting by Edward Burne-Jones Big Six wheel, a casino game also known as the Wheel of Fortune Wheel of Fortune...
A Wartenberg wheel, also called a Wartenberg pinwheel or Wartenberg neurowheel, is a medical device for neurological use. The wheel was designed to test...
in Wiktionary, the free dictionary. Sun wheel or solar wheel may refer to: Sun Wheel (Da Nang), a Ferris wheel in Da Nang, Vietnam Various solar symbols...
A prayer wheel, or mani wheel, is a cylindrical wheel (Tibetan: འཁོར་ལོ།, Wylie: 'khor lo, Oirat: кюрдэ) for Buddhist recitation. The wheel is installed...
Look up wagon wheel in Wiktionary, the free dictionary. Wagon wheel may refer to: The wheel of a wagon Wagon Wheels, a brand of biscuits in the United...
A train wheel or rail wheel is a type of wheel specially designed for use on railway tracks. The wheel acts as a rolling component, typically press fitted...
keeping the rim true while supporting applied loads. The term suspension wheel should not be confused with vehicle suspension. Wire wheels are used on...
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